Here's my question why do we know that the Hawks can do it.
Here's what they should do. Place him in a coffin of say 6" plate steel. Weld it shut. Figure out how to teleport it into the center of the moon. Year could be 100,000,000 A.D.
truth be told, this is due to the hath set origin more then it 'll ever be savage . the only way the hawks will kill hath set is if they merge into the hawk god avatar this is a story they are adapting from the books into the show.
Where karter, shyera and a decedent merged into the hawk God avatar and finally kill hath set and they form the justice society as their chair people. this also involved the hawk people of thanigar coming to decimate the planet too.
Here's what they should do. Place him in a coffin of say 6" plate steel. Weld it shut. Figure out how to teleport it into the center of the moon. Year could be 100,000,000 A.D.
as to your second question. the problem is Rip want's to be sure vandal savage in the show is whipped out of the time line/ the history of earth . To never torment people and their family's ever again.
Your plan doesn't go with that, cause it ensures some one of the archeologist verity or be they a treasure hunter, Relic hunter or tomb raider to dig him up in those future events if they colonies those planets, cause they like to learn and are curious and rip want him whipped out to never harm another family again.
it the same mistke I see fan's come plain about batman not ending joker . lol( Nathan is one of them and at times agree, when nathan brings those reason up where batman should end joker's life )
entombing savage won't help, when you keep saying your trying to kill him.
The point is Rip has ship that can not only time travel, but it's space worthy and he has missile's. if it wasn't that he was fallowing what the time masters wanted him to do in this show via manipulation of his mind which would explain all those time he could have captured him and ended it.
he should have launched him into the sun (any sun) with that missile by now,. like all those time people berried superman in both animated and book mediums. the only difference un like superman, savage 's atom's and genetic material will disintegrate by savage just being strapped to the said missile and not encased in some coffin of weird metal alloy.
And unlike the savage the the books (source material) that had enhanced cave man strength , you know this version of savage (mixed hath set) can't escape being strapped down . the the writers wanted an excuse for people as weak as their version Rip hunter(who not bright BTW again we know why) to have hand to hand fights with savage.